Răspuns :
3/7 = 9 km
7/7 - 3/7 = 4/7 mai are de parcurs
4/7 * 9 : 3/7 =
36/7 : 3/7 =
36/7 * 7/3 =
12 km mai are de parcurs
9 + 12 = 21 km are drumul dintre cele doua orase
7/7 - 3/7 = 4/7 mai are de parcurs
4/7 * 9 : 3/7 =
36/7 : 3/7 =
36/7 * 7/3 =
12 km mai are de parcurs
9 + 12 = 21 km are drumul dintre cele doua orase